Formaldehyde-free bamboo glulam and manufacturing method thereof
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A manufacturing method and glulam technology, applied in the direction of manufacturing tools, wood processing appliances, and joining of wooden veneers, can solve problems such as poor gluing, reduce hot pressing pressure, increase moisture content, and lower hot pressing temperature Effect
Active Publication Date: 2011-01-05
蔡宝珍
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[0008] 3. The ends and sides of the bamboo strips are small, the width of the chord surface of the end is 10-30mm, the thickness of the diameter surface is 2-
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Embodiment 1
[0034] (1) Preparation,
[0035] The material preparation process includes: selecting bamboo, sawing, cutting, rough planing, cooking (including anti-mildew, anti-moth and anti-corrosion treatment), drying, fine planing and other processes, which belong to the prior art. It is 20mm that bamboo is processed into chord surface width by above-mentioned operation, and diameter surface thickness is 5mm, and length is two kinds of specification bamboo strips of 2600mm and 1300mm (as figure 1 shown).
[0036] (2) Bamboo diameter surface sizing
[0037] Bamboo strip diameter surface sizing adopts glue sizing method. The adhesive used is water-based polymer isocyanate adhesive. Quantitative water-based macromolecule isocyanate adhesive is evenly coated on the diameter surface of bamboo strips (such as figure 2 shown).
[0038](3) Dimensional splicing
[0039] Splicing the bamboo strips on the diameter and surface, adopting the cold pressing method, using the bamboo strips with gl...
Embodiment 2
[0053] (1) Preparation,
[0054] The raw material preparation process includes: selecting bamboo, sawing, stripping, rough planing, carbonization, drying, fine planing and other processes, which belongs to the prior art. It is 20mm that bamboo material is machined into chord surface width by above-mentioned operation, and diameter surface thickness is 5mm, and length is the bamboo strip of 2600mm specification, (as figure 1 shown);
[0055] (2) Bamboo diameter surface sizing
[0056] Bamboo strip diameter surface sizing adopts roller gluing method. The adhesive used is polyvinyl acetate emulsion adhesive. Quantitative polyvinyl acetate emulsion adhesive is evenly coated on the radial surface of bamboo strips, (such as figure 2 shown).
[0057] (3) Dimensional splicing
[0058] Splicing the bamboo strips on the diameter surface, adopting the cold pressing method, the above-mentioned bamboo strips with glue applied to the diameter surface, using the manual assembly method,...
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Abstract
The invention relates to a formaldehyde-free bamboo glulam. The bamboo glulam is formed by splicing bamboo splints through radial surfaces and gluing the bamboo splints through tangential surfaces, wherein an adhesive of an adhesive layer arranged for splicing the radial surfaces is a polyvinyl acetate emulsion adhesive (white latex) or aqueous high-molecular isocyanate adhesive (API); and the adhesive of the adhesive layer arranged for gluing the tangential surfaces is the isocyanate adhesive. The invention also provides a method for preparing the bamboo glulam; and the method comprises the following steps of: preparing materials; applying the adhesive to the radial surfaces of the bamboo splints; splicing the tangential surfaces; applying the adhesive to the tangential surfaces of a single-layer bamboo laminated sheet; assembling the tangential surfaces; gluing the tangential surfaces; and performing post-processing and the like, wherein the adhesive used in the step of applying theadhesive to the radial surfaces is the white latex or API; and the adhesive used in the step of applying the adhesive to the tangential surfaces of the single-layer bamboo laminated sheet is the isocyanate adhesive. Due to the adoption of an aldehyde-free adhesive, the amount of the released formaldehyde of the bamboo glulam is below 0.1mg/L, and the gluing performance of the sheet is improved and the machining energy loss is reduced by applying the white latex or the API used in the splicing of the radial surfaces.
Description
technical field [0001] The invention belongs to the field of bamboo laminated wood and its manufacturing technology in the wood-based panel industry, and relates to a formaldehyde-free bamboo laminated wood and a manufacturing method thereof. Background technique [0002] Bamboo is a renewable and sustainable natural resource. It is widely used as a raw material for wood-based panels, construction, papermaking, furniture, medicine, food, and chemical industries. It is an effective substitute for wood. At present, the wood-based panels made of bamboo mainly include bamboo woven plywood, bamboo curtain plywood, bamboo glulam, and recombined bamboo. It is mainly used for bamboo flooring, furniture, kitchen and bathroom products such as chopping boards, tea sets and high-grade decorative materials such as sliced bamboo veneer. The adhesives used are generally urea-formaldehyde resin adhesives, melamine-modified urea-formaldehyde resin adhesives or phenolic resin adhesives, Th...
Claims
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